This may depend on the number of calendar entries you have in your calendar. Especially when using synced calendars with thousands of entries, it will take some time for the widget to process. In that case, it may help to reduce the month range. See this FAQ for details:
This may depend on the number of calendar entries you have in your calendar. Especially when using synced calendars with thousands of entries, it will take some time for the widget to process. In that case, it may help to reduce the month range. See this FAQ for details:
http://comingnext.sourceforge.net/drupal7/slow_what_todo